It's been years since I ran out of gas & never in the VX. The light comes on but I've never pushed it.
Funny story tho. My office is at the bottom of a fairly steep hill. One of my workmates stopped in one day to ask if I had a gas can & could run him up to the gas station. He could get about half way up the hill before it died.
Long story short - I told him to back up the hill. He made it, turned around at the top & drove 3 miles to the gas station.